alkanes

• saturated hydrocarbons with single bonds
• what is bond fission

  breaking a covalent bond
• ways a covalent bond can break

  heterolytic fission

  homolytic fission
• what is heterolytic fission

  bond breaks unevenly

  one atom receives both electrons from bonding pair
• homolytic fission 


  bond breaks evenly

  both atoms get one electron from bonding pair
• define photochemical reactions 


  reactions started by UV light
• halogenalkanes are formed in photochemical reactions between halogens and alkanes